BugID: #01062

I redumped the ROMs and I know they are good.
Oh, I see it. It's not so much corrupt tiles, but missing tiles, I assume?
The real PCB does that too, but randomly, not specifically at level 5-1 and
5-2. It's usually around level 3-x. I was able to skip all levels to the end
several times. But sometimes it would just crash at random levels. When it
happens, it crashes badly. I guess they assume the player would be so bored
of this game that they wouldn't play long, or gladly kill themselves to avoid
having to play it for longer than a few minutes. So they would never get to
the later levels anyway.... ;-)